Motorcycle tank bag



FIG. 1 is a perspective view of the motorcycle tank bag showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is an elevational view taken from the right side of FIG. 3, the left elevational view being a mirror image thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown in FIG. 1 are included for the purpose of illustrating environmental structure only, and forms no part of the claimed design. 

The ornamental design for a motorcycle tank bag, as shown and described. 